Gadget (6)
I believe the answer is:
device
'gadget' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for device that I've seen before include "Plan, scheme, trick" , "Trick; heraldic design" , "Charge" , "Specialised piece of equipment or tool" , "Heraldic emblem" .)